Simulação numérica de escoamento de fluido newtoniano generalizado de lei de potência em dutos de seção anular

Abstract

Generalized Newtonian fluids are present in multiple industrial areas such as cosmetics, food processing, polymer injection and wellbore oil exploration operations. The complexity associated with the mathematical modeling of power-law fluid flow in tubes with eccentric annular sections and with internal wall rotation makes it difficult to obtain analytical solutions. The purpose of this work is to develop numerical simulations to evaluate the influence of operational parameters on the pressure drop of power-law fluid flows in circular, concentric and eccentric annular ducts, and rotating inner wall for the eccentric case. The solution of the mass and momentum balance equations is based on the finite volume method. The flow is steady laminar, and through the circular, eccentric annular pipe section. The results indicate a significant influence of the power-law index on the pressure drop. Furthermore, the eccentricity of the annular tube also influences the flow behavior and generated pressure drop. Further more, the eccentricity of the annular tube also influences the flow behavior and significantly decreases the generated pressure drop.